How to
- Smart Bookmarks folders
- Smart keywords
- Sorting bookmarks
- Sort your bookmarks to quickly find the ones you want
- Splash Accounts - Managing Account Data
- Splash - Managing Account Data
- Split tunneling - use Mozilla VPN with specific Android apps
- Split tunneling - use VPN with specific Android apps
- Sponsored shortcuts on the New Tab page
- Sponsored tiles on the New Tab page
- Sponsored Top Sites
- SSLv3 error messages on Firefox
- Standalone address book
- Startup, home page and download settings
- Startup, home page, tabs, and download settings
- Stop receiving forwarded emails sent to your masks on Firefox Relay
- Stop receiving forwarded emails sent to your masks with Firefox Relay
- Storage API - some websites want to add files to my computer
- Storage API - some website want to add files to my computer
- Storage API - some website want to add files to my computer Redirect 1
- Subscribe and install Firefox Private Network Device-level protection
- Subscribe and install Mozilla VPN
- Subscribe to RSS feeds with Firefox for Android
- SUMO - Managing account data
- Supported platforms and system requirements
- Support for Hello discontinued in Firefox 49
- Surf and watch videos on Firefox for Fire TV
- Switch from Chrome to Firefox
- Switch from POP to IMAP account
- Switching between Multiple Email Accounts
- Switching from Chrome to Firefox
- Switching the folder pane view
- Switching to Firefox Extended Support Release (ESR) for personal use
- Switching to Thunderbird
- Switching to Thunderbird from Windows or Web-Based Email Applications
- Switch or quit apps
- Switch or quit apps on Firefox OS
- Switch to another language on Firefox Reality
- Switch to a secure email provider
- Switch to a secure email provider on Firefox OS
- Switch to desktop view on Firefox Focus for Android
- Sync bookmarks, logins and browsing history on Firefox for iOS
- Sync bookmarks, tabs, history and passwords on Android
- Sync custom preferences
- Sync Firefox data
- Sync logins in Firefox desktop
- Sync logins in Firefox for Android
- Sync logins in Firefox for iOS
- Sync your Firefox bookmaks and browsing history in iOS
- Sync your Firefox bookmarks and browsing history in iOS
- Sync your Firefox bookmarks and browsing history in iOS Redirect 1
- Sync your Firefox bookmarks, history, passwords and more
- Sync your Firefox bookmarks, open tabs and browsing history in iOS
- Sync your Firefox browsing history in iOS
- Tabbed browsing
- Tab context menu
- Tab context menu - close multiple tabs
- Tab context menu in Firefox - close multiple tabs
- Tab Groups feature discontinued
- Tables - Format messages with rows and columns
- Tab overview menu
- Tab preferences and settings
- Tab Scroll Quickly
- Tagging in Pocket for Android
- Tagging in Pocket for iOS
- Tagging in Pocket on your computer
- Take screenshots
- Take screenshots in Firefox
- Take screenshots on Firefox
- Take screenshots on Firefox OS
- Take screenshots Redirect 1
- Taking a Screenshot on Firefox OS
- Taking Photos
- Taking Photos on Firefox OS
- Task Manager - see what tabs or extensions are slowing down Firefox
- Task Manager - see whether tabs or extensions are slowing down Firefox
- Telemetry collection and deletion
- Telemetry Collection & Deletion
- Telemetry collection - Windows default browser trends
- Telemetry collection- Windows default browser trends
- Telemetry collection: Windows default browser trends
- Testing future versions of Firefox for your organization
- Testing versions of Firefox for your organization
- Test Pilot
- Test Pilot - Firefox experimental features
- Test Pilot - test Firefox's experimental features
- Test Pilot - try Firefox's experimental features
- Test Pilot - try Firefox's experimental features Redirect 1
- Test versions of Firefox for your organization
- Text Zoom
- The Add-on Bar gives you quick access to add-on features
- The difference between IMAP and POP3
- The Flash plugin is blocked on some sites by default
- The Pocket Glossary
- Thimble - Managing account data
- Third-party cookies and Firefox tracking protection
- Third-party trackers
- Through the Looking Glass
- Thunderbird 3.1 End of Life FAQ
- Thunderbird add-ons - frequently asked questions
